Problems relating to analgesia in various situations are briefly discussed. A simple working classification for analgesic administration is given. The results of a trial, in which 50 mg of a new analgesic, tilidine, was given sublingually, are presented. The drug was evaluated in cases where immediate analgesia was indicated. The majority of patients had injuries to the hand or head. It was found that tilidine provided a marked analgesic effect in 27 of the 30 patients. The onset of action was rapid, 25 of the 30 patients obtaining complete relief within 6 minutes. It is concluded that tilidine is a powerful analgesic, with a rapid onset of action when it is give in the sublingual drop form. Moreover, it is a drug of choice, in this form, for acute, moderately severe situations (those which require immediate analgesia, but where opinates are not thought to be necessary).